30% of the faults (purple) are 1H00 ion chamber and Hall B halo. Likely caused by 1H00. Time to increase instantaneous trip points again? Or move the ion chamber during the Fall Down to put it closer to the equipment it's supposed to protect, which I'm told is the pulse tube refrigerator, and farther from the beam line? Or shield the equipment and lose the ion chamber?
Set slit size to 16.00, Atten. to 340, and engaged the PID locks
for IPM1H04B/D & turned off their target lock. Also set their
raster at 18.00(h)x10.80(w) per their request.
I tried sending the hall 20nA with their slit open, they said it wasn't good.
I asked if their experiment required the slit to be fully open (or if it was slit size dependent
in any way), they answered no.
So I suggested we decrease the slit size to about 16.00 (as we have done in the past)
and set the attenuator higher to get them to where they wanted to be.